MRX SCHEDULE 13G/A: SEC filing

An institutional holder

Filed with the SEC on Aug 10, 2026 · accession 0001104659-26-093154

MRX filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Aug 10, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -0.4% by the first close after the filing.

Summary of the filing

An institutional holder filed an amended Schedule 13G disclosing a passive ownership position in Marex Group Ltd. The filing indicates a change in the holder's previously reported beneficial ownership.

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Key details

IssuerMarex Group Ltd

How MRX stock reacted

Close before

$60.81

Aug 7, 2026

First close after

-0.43%

$60.55

5 trading days

+16.86%

$71.06

Since filing

+8.83%

$66.18

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Frequently asked questions

What did MRX file with the SEC on Aug 10, 2026?

MRX filed a SCHEDULE 13G/A (SEC filing). An institutional holder filed an amended Schedule 13G disclosing a passive ownership position in Marex Group Ltd. The filing indicates a change in the holder's previously reported beneficial ownership.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did MRX stock react to this filing?

MRX closed at $60.81 before the filing and $60.55 on Aug 10, 2026 (-0.43%). Five trading days later: $71.06 (+16.86%).

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